https://www.techradar.com/news/how-nikons-d850-is-tested-to-the-extremes

While all the buzz at the moment is about Nikon's forthcoming full-frame mirrorless camera, the company has just released an interesting little video that reveals some of the stringent tests its full-frame D850 DSLR went through.

The promo video from Nikon Asia gives us a glimpse of some of the harsh conditions the D850 had to endure to meet Nikon's strict reliability tests, including simulations of temperatures and humidity levels far beyond the operating range in which the camera is intended to be used. The video also shows Nikon also conducting drop, impact and vibration tests.